Dishwashing machine



W. L. LINDGREN DISHWASHING MACHINE Filed Au March 31, 1931'.

2 Sheefs-Sheet l March 31, 1931. w. LINDGREN i y DIS'HwAsHING MACHINE Filed Aug. 14, 1928 2 Sheets-Sheet 2 Patented 31, 19'31- UNITED STATES 'PATENT oFFlcE i warnnmm L. er wamean, more, Assieme or cient-Hexali To .form n messen, or emesso, 'more msnwasnme application mea august 14, ma.' smaila. 299,486.

My invention is `concerned with dish washers, ,and is designed to produce an ex tremely simple portable device intended primarily for domestic use and 'dispensing g with all pumping mechanism, and whereby dishes .can 'be quickly and efficientlyl washed, with a expenditure of energy, as nothing but fresh water is applied at any time to the dish.

My invention is further concerned with a simple device of the class described in which, by simply connecting it to a hot-water faucet and. operating the carrier, the dishes placed on the receiving end are first sprayed with soapy water and then sprayed with hot rinsing water to clean oif th'e soap before they are discharged from the carrier.

To illustrate my invention, I annex hereto two sheets of drawings, in which'the same reference characters are used to designate identical parts in allthe figures, of which,-

Fig. 1 is a side elevation;

VFig. 2 is a sectional view, on a slightly larger scale, on the line 2-2 of Fig. 1;

Fig. 3 is a central, longitudinal section;

Fig. 4 isa fragmentary detail, showing the construction of a skeleton carrier; l

- Fig. 5 is a view in horizontal section on the line 545,'of Fig. 3; and

Figs. 6 and 7 are perspective views further illustrating'the construction of the soap box.

' In carryingout my invention, I preferably: employ a frame made up of two substantially symmetrical side castings 10 having the feet 1'1 adapted to rest on the bottom of a sink, and these-'are connected at their ends by a pair of castings 12 having triangular sides and a horizontal top plate, whichpreferably has a y covering. 12* of rubber. Journaled in y suitable bearings 'in one end of the side frames is a shaft 13 having secured thereon, just inside of the frame members, the sprocket wheels 14, which are adapted to co-operate with the rods 15, best seen in Fig. 4, which are connected at their ends by the links 16 so Y as to form an endless skeleton carrier' which may be supported on its upper run by the ribs 17 projecting inwardly from the sides of the frame members 10. At the other end of the frame, I provide a shaft 18, having' seg by the bracket 29 secured to the adjacent' side cured thereon va corresponding pair of sprocket wheels 19, although it will be understood that I might employ an equivalent construction.- With the constructlonthus far described, it will-be obvious that I have a skeleton carrier on one end of which the dishes to be washed may be placed, so that by turning the handle 2O secured to the shaft 13, or by otherwise rotatin the' shaft, the dishes may be advanced to t e other end of the apparatus, to be washed by the devices hereinafter described.

. For this purpose, I provide a connection 21, adapted to be quickl secured to the 'hotwater faucet of a sink, or some other suitablesource of a water supply under a head, and having the .short pipe 22 connected by the elbow 23 with the short pipe 24 connected to the 'T 25, the opposite end of which has secured -therein the pipe 26 leading to the combined soap vand spray receptacle 27, to be' more fully described hereinafter. The T 25 also has extending `upwardly therefrom the pipe 28, which is preferably supported castingr '10 of the framework, andthe upper end o the( pipe 28 is connected by the elbow 30 with the pipe 31 connected at its other end to a comblned soap and spray receptacle 27, which is' like the receptacle 27 ex` ceptthat it sprays downwardly instead ofv upwardly. The T 25 has a third horizontal pipe 32 extending'alongside the framework and connected by the elbow 33 with the T 34, which has its horizontal outlet connected 'to the pipe 35, extending inwardly through the adjacent side casting 10 and terminating in the spra member 36 to be more fully ,described. e T 34 also carries the upwardly extending pipe37, which is connected ,at its upper end by the elbowy 38 with the horizontal pipe 39 having secured at its inner end the spray receptacle 36, similar to the receptacle 36, except that it sprays downwardly instead of upwardly. The inner walls of the frame pieces 1() are preferably lined b y the sheet-metal plates 40, seen in section in Fig. 2, and I preferably employ the genemily-rectangular, sheet-metal cover 42 o at its ends, and strengthened there by the in- 10| vetted U-"shaped wires 43, the cover containing openings at the upper end to accommodate the s ray 'portion o fthe members 27 and 36". his cover is referably detachably secured to the upper e ges of the frames by the'ears 44 and screws 45, as shown in Fig; 1.

he s ray members 36 and 36have their top and bottom portions, respectively, formed semicylindrically in longitudinal cross-section, 1. e., in the direction of the length of the machine, and curved in transverse crosssection, as will be seen in the similar bottoms of the combined soap and spray receptacles 27 and 27. The result of this shaping of the perforated bottoms is to deliver a spray of water that extends substantially to the sides of the machine, striking on the dishes that may be carried, as well as on all parts of the carrier and frame, so that the entire machine is self-cleansing, as it were, as'it is being constantly `washed by fresh hot water, and an dirt detached from the dishes is washed \o of thefmachine and into the bottom of the i sink, whence it flows to the drain.

The combined soap and spray member`s`27 and 27* have thesame spraying perforations, but have in addition the generally-rectangular, central cavity 46 that has an opening in its outer end, which is adapted to be closed by the inte ral flanged end 47 of the sheetmetal soapox 48 adapted to it in but be spaced away from the inner walls of the rectangular portion of the receptacles 27 and 27. The four sides of the soap holder or box 48 may be formedA of a single piece of` sheet-metal, one end being closed by the {ianged end 47, as previously described, while tthe other endis closed by the removable sheetmmetal strip 49,Ladapted to fit in said otheri wise`open end, and to have its ends turned inwardnd providedV with lugs 50 adapted (to t in thet'wo opposedr apertures 51 formed inthe sides ofthe adjacent end of the soap box 48. This ieee 49, being Jformed of sheetmetal, has su cient elasticlty so that it can be sprung into place with itsears entering the, recesses 51. The four sides ofthe soap box are provided along each angle with a row liOof rather. large perforations 52, and the operation of this novel combined soap rece tatcle and spray is to cause the hot water owing from the pipes 26" and 3f1uagainst the \.bott.om and rtop, respectively, of theo soap 54, boxes 48 ,to enter the perforations 52 and iow along the sides" ofI the 'cake of soap 53 with the result that the sides of the cake are worn away-first, and eventually -the central part will be worn away by the continued How of thewater therein; I. have f ound, experimentally, that if the water' is admitted against the center of the cake of soap, the central portion'alone is worn away and the resulting operation is defective as 95 compared with the` use of the structure heref in shown. I have also found, experimentally, that if the water 'is taken into the piping at tlfie level ofthe tcp of Ihehmachme, most o it sprays out. t roug t e u per spra members 27 and 36, and there is not suii cient pressure inthe lower members 27 and 36, but by taking the water from the lower level, a suiiicient spray is secured from the members 27 and 36, and that gravity aids the reduced pressure of the upper: members 2'?l and 36a.

The operation of my improved apparatus will be readily apparent. Assuming that the dishes are placed on the left-hand end late or table 12 and thence shoved on to the s ele-I ton carrier operated by turning the handle 20, they will be carried as slowly as may be desired, first beneath the spray of hot suds, and then beneath the spray of hot rinsing water, so that they will emerge at the other end and be discharged on to the other table 12 clean.

To hold the soap box 48 firmly, but readily detachable, in the rece tacles 27 fand 27, I provide on one side o said receptacles the pair of ears 54, between which is ivoted the link 55 in turn pivoted to the lin 56, which 1 in turn is pivoted to the link 57 havin the hook'end 58 adapted to catch over the pin 59 extending between the ears 60 opposed to the ears 54. A' thumb screw'61 is threaded through the center of the link L56 and' engages the center of the outer face of the end,

cake of soap'put. in place. In order to give' access to the receptacle 27, I provide the oval opening 63' inthe frame 10,A andes corresponding opening in the lining 40, this opening normally being closed by the.I outer cover plate 64 fitting thereover, as seen in Fig. 1.

ile'I have herein. shown and described a novel soap container for use in my dishwasher I do not herein claim said soap container,but reserve the same for a divisional present considenbestfada ted to carry out its purposes, 'it willbe'un erstbod that it is capable of modificatfns, and that I do not'.y

ile I have shown and described my in-f vention as embodied in the "forniv which I at What I claim as new, and dsire 'tosecure' by-Letters I atent of thqUnited States, is;V

1. In a `dlsh-washing apparatus, the com'- l i l, l.

bination with a bottomless framework of a size adapted to be placed in a kitchen sink, of an endless skeleton carrier mounted thereon to carry'v the dishes placed on the horizontal upper run .from the receiving to the dischar e end of the machine,'perforated spray mem ers extending transversely of the carrier above and beneath said horizontal upper run, means for connecting said spray members to a faucet in thesink, and means for operating said carrier, the organization being such that the dishes on the carrier and the carrier itselfand the adjacent framework are washed, and any dirt washed oil of them is carried vertically downward directly to the l bottom of the sink. o

2. In a portable dish-washing machine, the combination with a bottomless frame, of a skeleton carrier mountedtherein, spraying means having spraying orifices for soapy I.water adjacent the receiving end of the machine, spraying means for clear water adj acent the discharging end of the machine, connections from saidspraying means to a source of hot-water supply having a head, so that hot water can ow directly to both of said spraying means by its own head, 'and a receptacle adapted to contain soap intermediate the source-of supply and the spray ori-4 fices of the first spraying means, so that the clear hot water flowing to said soapy-water spraying means through said receptacle dissolves some of the soap, so that as the dishes. are carried through the machine they are rst sprayed with clean soapy water and then with clean clear water, all the waterr passing through, thel spraying means being discharged immediately. from the machine, so that nothing but clean I'soapy water and clean clear water is sprayed on the dishes, said clean soapy water and clean clear water, being sprayed simultaneously, but on diierent parts of the carrier. h.

3. In a portable diSh-waShngfmachine, the combination with a bottomless frame, of a skeleton carrier mounted therein,n a pair of clean soapy water and clean clear water being sprayed simultaneously, but on different parts of the carrier.

In witness whereof, I have hereunto set my hand this 4th da of August, 1928.

4 WALDE R L. LINDGREN.

spraying means having spraying 'orifices for.

ysoapy water adjacent the receiving end of the machine, one mountedabove the carrier and the 'other below it, a pair `of spraying means having spraying orifices for 'clear water adjacent the discharging end the' machine and similarly located relative to the carrier, connections 'from said spraying means to a source pf hot-water su ply having ahead, so that hot water can ow directly to both pairs of spraying means by 'its' owny head, and a receptacledapted to contain soap intermediate the source of supply and the spray orifices of each of said soapy-water f sprayingmeans, so that the clean vhot water ,flowing to said soapy-water spraying means through saidrecptacles dissolves some of the soap, so that as the dishes arecarried through the machine they are first sprayed frmabove i l Y 

